Very late comment:
Your SA needs to modify his/her criteria, and instead look at percentage of CPU used by your App and other running Apps.
Also, if your App is the only one running - who cares how much CPU it is using, let it use 100%.
The SA also needs to look at the business criteria for the Apps running. If your App is a business critical App and it needs to process the XML faster than other running Apps need to get their work done, then it deserves to get a greater amount of CPU time, or perhaps it needs its own server.